It makes no difference in if it effects MY LIFe. That was your question. Not being able to eat peanuts at the ballpark effects my life regardless of who initiated the absurb measure that's entirely out of proportion to the actual problem at hand.
Are there ballparks with peanut-free sctions? If so then it's not a strawman.
No it doesn't make good business sense. On average a section will seat around 100 people. Given the standard draw of a minor league ball park you're closing off 1/30 of the seats to "assist" less than 1% of the attendees. Meanwhile you have to train your walking vendors not to sell certain items in those sections, and your event staff no to allow people to bring certain items into those sections. Then if something goes wrong, since you've made this promise you're now liable for damages that may arise from accidental introduction of peanuts into this section. All for 3 people with an allergy plus whoever they bring with them. That's terrible business sense, a dramatic increase in cost of legal liability for not even enough people to fill the section.